Prove that the following functions do not have maxima or minima:(i) `f (x) = e x` (ii) `g(x) = log x`(iii) `h(x)=x^3+x^2+x+1`

Explanation

To prove that the given functions do not have maxima or minima, we will differentiate each function and analyze the results.

### (i) Function: \( f(x) = e^x \)

**Step 1: Differentiate the function.**
\[ f'(x) = \frac{d}{dx}(e^x) = e^x \]
...